Bath tub



FIG. 1 is a top perspective view of a bath tub showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view of the bath tub shown in FIG. 1, the rear being a mirror image thereof; and,

FIG. 5 is a right end elevational view of the bath tub shown in FIG. 1, the left end being a mirror image thereof. 

The ornamental design for a bath tub, as shown and described. 